Michael's Cue-bids

Standard implementation

Used as in the standard French system, with hands
containing the values for an opening bid. After a minor-suit opening,
an overcall of 2 ♦ shows
a hand with two 5-card majors. After a
major-suit opening, a cue bid shows a hand containing 5 Clubs and 5
cards in the unbid major. The overcall of 3 ♣ after a major-suit
opening shows a hand containing 5 Diamonds and 5 cards in the
unbid major. The cue-bidder's partner must choose the suit in which he
has the better holding. This option replaces the strong cue bid (more
than 20 points)

Alternative implementation

Only cue bids of a natural opening bid show a 2-suited
hand. Cue bids of minor suit openings show a hand with two 5-card
majors. Cue bids of major suit openings show a hand containing a 5-card
minor and 5 cards in the unbid major. Partner's response of 2NT asks
for a bid of the 5-card minor. This option replaces the strong
cue-bid (more
than 20 points)

Leaping

The bid of four of a minor over a weak major shows a
strong 2-suited hand (more than 14 points) containg the bid minor and
the other major. For example, the bid of 4 ♣ over a weak opening 2 ♠
shows a strong 2-suited hand containg five Clubs and five Hearts. This
type of bid can also be made in the protective position after a major
suit has been opened and raised.